Download or read book Cultivars, Anthropic Soils, and Stability written by Santiago Mora C. and published by Center for Comparative Arch. This book was released on 1991 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt: Clear evidence that sedentary farmers cultivated both maize and manioc in the Colombian Amazon Basin by 2700 B.C. During the first few centuries A.D. a larger population actively managed organic garbage and eventually transported large quantities of silt from the river banks to improve the agricultural yields of the plateau they farmed. Complete text in English and Spanish.